JPH034981B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing apparatus, and more particularly to a device mechanism for different types of cassettes.

There are various types of products called home VTRs depending on their purpose.
A stationary VTR uses a large tape cassette with many magnetic tape winding devices for long-time recording or playback, and a comparatively small and lightweight magnetic tape winding device that is convenient for outdoor use. A handy-type VTR that uses a small number of tape cassettes can be considered. In this case, the above-mentioned two VTRs naturally have different configurations such as the spacing between reel stands (reel shafts), and the tape cassettes used for both differ not only in the reel spacing but also in the external dimensions, so it is necessary to ensure compatibility between the two. was difficult. Therefore, in consideration of such points, stationary VTRs and handheld type VTRs
Even if the tape cassettes used for both VTRs have different dimensions and shapes, even if the recording formats of the magnetic tapes are the same,
It is conceivable to diversify VTRs by moving the reel stand in accordance with the reel positions of both tape cassettes and making it possible to use both tape cassettes in combination. Therefore, in this method of moving the reel stand, it is necessary to identify the cassette before engaging the reel of the cassette with the reel stand, move the reel stand to the reel center position of the identified cassette, and then There are ways to give it to you. The first method is to have a person identify the cassette and use an external operation to move the reel stand before loading the cassette. This method is not a preferable method due to the problem of human error in external operation. The second method is to identify the cassette when it is stored in the cassette storage and to move the reel stand during a short period of time until the cassette is installed. This method can be used to identify the cassette mechanically or electrically; however, in the former method, the movement of the reel table is also operated by the cassette identification mechanism. The disadvantage is that the mechanism becomes complicated.
In addition, in the latter electrically identified type, the reel stand is moved by a motor or the like, so a safety mechanism or the like is required to prevent the cassette from being attached until the movement of the reel stand is completed, which has the disadvantage of complicating the configuration. . None of the above methods can be said to be a preferable cassette mounting method.

The present invention proposes a magnetic recording/reproducing device which can be easily moved to a position corresponding to each reel even if the pitch between the reels of the cassette is different, and can be used in conjunction with a large cassette and a small cassette.

The configuration of the present invention will be explained below based on the drawings showing one embodiment thereof. In Figs. 1 and 2, 1 is a short-time recording/playback cassette (hereinafter referred to as a small cassette) that rotatably stores small reels 2a and 2b, and the small cassette 1 is rotatable with pins 3a and 3b. It has built-in rotating posts 4a and 4b that are held. The rotating posts 4a, 4b are attached to the magnetic tape 5.
is stretched in front of the small cassette 1 so that it can be pulled out. Further, the small cassette 1 has the small reels 2a,
A leaf spring 7 that biases 2b toward the reel stands 6a and 6b.
(Figure 5). 8 is the large reel 9a,
The large cassette 8 is a long-time recording/playback cassette (hereinafter referred to as a large cassette) that rotatably houses a cassette 9b, and the large cassette 8 incorporates rotating posts 11a and 11b that are rotatably held by pins 10a and 10b. The rotating posts 11a and 11b extend the magnetic tape 5 in front of the large cassette 8 so that it can be pulled out. The large cassette 8 also holds a leaf spring 12 that biases the large reels 9a, 9b toward the reel stands 6a, 6b (FIG. 5). In FIG. 5, the reel stand 6
a, 6b hold reel drive pins 14a, 14b which are biased in the direction of arrow A by a compression spring 13 and are movable up and down. The reel drive pins 14a, 14
When the reel stands 6a, 6b rotate, the small reels 2a, 2b engage with the large reels 9a, 9b, thereby rotating the small reels 2a, 2b or the large reels 9a, 9b. 15a and 15b are spheres rotatably held on the reel stands 6a and 6b. Further, the reel stands 6a, 6b have reel shafts 17 implanted in the reel stand moving boards 16a, 16b.
It is rotatably held by a and 17b. 18
a, 18b are brake levers, and the brake levers 18a, 18b are connected to the reel table moving boards 16a, 1.
It is rotatably held by brake shafts 19a, 19b installed in the reel stands 6a, 6b.
The rotation of the reel stands 6a, 6b is braked by contact with the reel stand 6a, 6b. The brake levers 18a, 18b
is a spring 21 whose one end is hooked to pins 20a, 20b implanted in the reel table moving boards 16a, 16b.
a and 21b in the directions of arrows B and C.

Reference numeral 22 denotes a tension lever. The tension lever 22 is rotatably supported around a tension lever shaft 24 implanted in a base plate 23, and has a tension post 25 at one end that comes into contact with the magnetic tape 5. , the free end of the tension band 26 is rotatably held at the other end by a pin 27. The tension lever 22 is biased clockwise by a tension spring 29, one end of which is hooked to a spring hook pin 28 implanted in the base plate 23. The other end of the tension band 26 is fixed to a tension band fixing plate 30 attached to the reel table moving board 16a. Tape tension control is mechanically performed by the tension post 25, tension lever 22, tension band 26, and reel stand 6a.

The reel table moving boards 16a and 16b are connected to pin 2.
Board 23 at the lower stage of pin 27 with the same center as 7.
The reel table can be rotated around moving shafts 31a and 31b (FIGS. 8 and 9), which are implanted in the base plate 23, and spring hanging pins 32a and 32b are implanted in the base plate 23.
It is biased in the directions of arrows D and E by springs 33a and 33b, one end of which is hooked to. 34a, 34b
and 35a, 35b are position regulating stoppers,
As shown in FIGS. 1 and 2, the position regulating stoppers 34a, 34b, 35a, 35b position the reel table moving boards 16a, 16b. 36a and 36b are springs for moving the reel stand;
The reel table moving springs 36a, 36b have one end hooked to the reel table moving board 16a, 16b and the other end connected to the reel moving wires 37a, 37b, and have a spring constant larger than that of the springs 33a, 33b. ing. The reel moving wire 37
a, 37b are pins 38a implanted in the substrate 23;
Rollers 39a, 3 rotatably held by 38b
9b, and one end is fixed so as to be wound around a pulley 40. The pulley 40 is connected to the substrate 23
It is fixed to a pulley shaft 41 rotatably provided. The pulley shaft 41 integrally has a worm wheel 42 at one end, and the worm wheel 4
2 is driven by a worm gear 45 attached to a motor shaft 44 of a motor 43. The motor 43 starts rotating when the small cassette 1 closes the cassette identification switch A46 and opens the cassette identification switch B48, and rotates the reel table moving boards 16a, 16b in the directions of arrows D and E. However, when the reel stands 6a, 6b are located at positions where they can engage the small reels 2a, 2b, the motor 43 does not rotate. Furthermore, the reel table moving boards 16a and 16b are connected to switches 47a and 4.
When 7b is closed, the rotation of the motor 43 is stopped.
At this time, the reel stands 6a, 6b are located at positions where they can engage with the reels 2a, 2b, as shown in FIG.
Further, the motor 43 is connected to the large cassette 8 by the cassette identification switch A46 and the cassette identification switch B.
When 48 is closed, rotation starts, and the reel table moving boards 16a, 16b are rotated in the direction opposite to the arrows D and E. However, when the reel stands 6a, 6b are located at positions where they can engage with the reels 9a, 9b, the motor 43 does not rotate. Further, the reel table moving boards 16a, 16b are connected to switches 49a, 4.
When 9b is closed, the rotation of the motor 43 is stopped.
At this time, the reel stands 6a and 6b are placed in positions where they can engage the reels 9a and 9b, as shown in FIG.

In FIG. 3 and FIG. 4, 50a, 50b
are brake release levers, and the brake release levers 50a and 50b are rotatable around brake release lever shafts 51a and 51b embedded in the base plate 23. 52 is a reel driving idler, and the reel driving idler 52 is connected to an idler lever 53.
It is rotatably held by an idler shaft 54 implanted in the. The idler lever 53 is rotatably held by a pin 56 provided on the idler operating lever 55. The idler actuating lever 55 is biased around the idler actuating lever shaft 59 by an idler press-contact spring 58 whose one end is locked to a spring catch 57 embedded in the base plate 23, and the reel driving idler 52 is rotated by the motor pulley 60. It is biased towards the side. The motor pulley 60 is connected to the board 23
Motor shaft 6 of reel motor 61 attached to
It is attached to 1a. The reel driving idler 52 is pressed against the motor pulley 61, and the reel drive idler 52 is in pressure contact with the motor pulley 61, and is rotated by the supply reel stand 6a according to the rotational direction of the reel motor 61.
Or it moves to the take-up reel stand 6b side, and the driving force of the reel motor 61 is applied to the supply reel stand 6a or the take-up reel stand 6b by the automatic biting force of the reel driving idler 52 and the urging force of the idler pressure contact spring 58. communicated. The release roller 62 is rotatably held by a pin 65 implanted in a release gear 64, and the release gear 64 is rotatably held by a release gear shaft 67 implanted in an auxiliary board 66.
Reference numeral 68 denotes a worm gear, which is attached to a motor shaft 69 and rotates the release gear 64 as the motor 70 rotates. The motor 70 is attached to an auxiliary board 66 attached to the board 23. Due to the rotation of the release gear 64, the release roller 62 rotates the idler operating lever 55 counterclockwise around the idler operating lever shaft 59, and the release roller 62 rotates the idler operating lever 55 in the counterclockwise direction around the idler operating lever shaft 59, thereby causing the supply reel stand 6a or the take-up reel stand 6b of the reel driving idler 52 to rotate. The contact with the is released. At the same time, the brake release lever 50a
can rotate counterclockwise around the brake release lever shaft 51a, and the brake release lever 50b
is able to rotate clockwise around the brake release lever shaft 51b, and therefore the brake lever 18
Power point pins 63a, 63b provided on a, 18b
is released, the brake levers 18a, 18
b is pressed against the reel stands 6a and 6b by the biasing forces of the springs 21a and 21b in the A direction and the B direction, respectively.

The pin 27 of the tension lever 22 and the power point pin 63a of the brake levers 18a, 18b,
As shown in FIG. 8, 63b is configured to be co-centered or nearly co-centered with the reel table moving shafts 31a, 31b of the reel tables 6a, 6b during recording and reproducing of the magnetic tape 5. By configuring the reel stand 6a, 6b when using either the small cassette 1 or the large cassette 8.
Even if the tension band 26 moves, the tape tension control conditions can be kept unchanged without changing the length of the tension band 26. Furthermore, the relationship between the clearances H ₁ and H ₂ between the brake levers 18a and 18b and the reel stands 6a and 6b hardly changes.

The magnetic tape 5 is transferred from the small reel 2a or large reel 9a to the rotating post 4a or rotating post 11.
a, and the tension post 25
(Tension post 25 is used only during recording and playback), rotating post 71, inclined post 72, rotating post 73, 7
4. Erase head 75, limiter post 7
6. A rotary cylinder 77 containing a rotary head (not shown), a limiter post 78, an audio and control head 79, and is driven by a capstan 80 and a pinch roller 81. Further, the magnetic tape 5 returns to the inside of the small cassette 1 or the large cassette 8, and is transferred to the rotating post 4b.
Alternatively, it is wound onto the small reel 2b or the large reel 9b via the rotating post 11b. The magnetic tape 5 is not driven by the capstan 80 and the pinch roller 81 at times other than recording/reproducing, but is only driven by winding onto the small reel 2b or the large reel 9b. The rotating posts 71, 73, 74 and the inclined post 72 are operated by a rotating ring 82 to pull out the magnetic tape 5 from the small cassette 1 or the large cassette 8. The rotating ring 82
are pins 83a, 83b, 8 implanted in the board 23.
A guide roller 84a rotatably held at 3c,
It is guided by 84b and 84c and rotated by a loading motor (not shown). Said capstan 8
0 is rotatably supported by a bearing 85 attached to the substrate 23. The capstan 80 has a capstan pulley 86, and the capstan 80 is received by the capstan pulley 8b via a belt 89 by a driving force motor pulley 88 of a capstan motor 87, and is rotated clockwise.

In FIG. 3, the pinch roller 81 is rotatable around a pinch roller shaft 91 implanted in a pinch roller arm 90, and the pinch roller arm 90 is rotated around a pinch roller arm shaft implanted in a substrate 23. It is rotatable around 92. The pinch roller arm 90 has its other end rotatably connected to one end of a toggle lever A93 via a shaft 94, and the toggle lever A93 has its other end connected to one end of a toggle operating lever 95 and a toggle lever B.
The toggle lever B96 is rotatably connected to one end of the toggle lever B96 via a pin 67, and the other end of the toggle lever B96 is rotatably connected to one end of a toggle lever C98 via a pin 99. It is possible to rotate around a shaft 100. Reference numeral 101 denotes a pinch roller pressing spring, and one end of the pinch roller pressing spring 101 is locked to a spring hook pin 102 implanted in the base plate 23, and biases the toggle lever C98 clockwise. A stopper 103 restricts the clockwise rotation of the toggle lever C98. Reference numeral 104 denotes a pinch roller return spring, and the pinch roller return spring 104 is attached to the spring hanging pin 1 implanted in the substrate 23.
05, and urges the pin 97 and the toggle operating lever 95 in the direction of arrow F. The other end of the toggle operating lever 95 is rotatably connected to one end of a pinch roller pressing lever 106 via a pin 107. It is rotatable. 109 is a pinch roller pressing pin implanted in the rotating ring 82;
The rotating ring 82 is connected to the rotating posts 71, 73, 74.
After moving the inclined post 72 to a predetermined position (FIGS. 1 and 2), the pinch roller pressing pin 10 is moved by the stroke of the pinch roller pressing.
9 in a clockwise direction. The pinch roller pressing pin 109 operates the pinch roller pressing lever 106 by the clockwise rotation of the rotation ring 82, and further operates the toggle operating lever 95, toggle lever A93, toggle lever B96, toggle lever C98, and pinch roller arm 90. . At this time, the pinch roller pressing pin 109 is pressed against the pinch roller 81.
is brought into contact with the capstan 80, and a gap W is left between the toggle lever C98 and the stopper 103, and the pressing force of the pinch roller pressing spring 101 is applied to the pinch roller 81. Further, the tension lever 22 is operated simultaneously when the pinch roller 81 is pressed against the capstan 80 (not shown),
The tension post 25 is brought into contact with the magnetic tape 5.

7 and 9, the small cassette 1 is stored in the adapter 111 when it is stored in the cassette storage 110. In FIG. Since this adapter 111 has a notch 111a, the cassette identification switch B48 is not operated. 1
A leaf spring 12 is attached to a cassette storage 110 that can store the small cassette 1 and the large cassette 8. The leaf spring 112 urges the small cassette 1 and the large cassette 8 toward the storage lower case 113. There is. The storage lower case 113 has escape holes (not shown) for moving the reel stands 6a, 6b. In addition, if the center of the reel stands 6a, 6b and the center of the small reels 2a, 2b or the large reels 9a, 9b are different from each other, the cassette storage 110 can hold the balls 15a, The small cassette 1 or the large cassette 8 is held between the small cassette 15b and the leaf spring 112. At this time, there is a gap K between the small cassette 1 or the large cassette top 8 and the storage lower case 118.

Next, its operation will be explained. First, the operation of attaching the small cassette 1 or the large cassette 8 to the main body of the apparatus will be explained. The small cassette 1 or the large cassette 8 is stored in a cassette storage 110. Reel stand 6
If the centers of the reels a and 6b are the same as the centers of the small reels 2a and 2b or the large reels 9a and 9b, when the cassette storage 110 is attached to the main body of the device, the reel stands 6a and 6b and the small reels 2a and 2b or the large reels 9a and 9b are engaged. In addition, the reel stand 6a,
If the center of the small reel 6b is different from the center of the small reel 2a, 2b or the large reel 9a, 9b, when the cassette storage 110 is attached to the main body of the device, the small cassette 1
is stored in the cassette storage 110, the cassette identification switch A46 is closed and the cassette identification switch B48 is open, so it is determined that the small cassette 1 is installed, and the motor 4 is
3 rotates, the pulley 40 loosens the reel moving wires 37a, 37b, and at the same time, the springs 33a, 33b move the reel stands 6a, 6b in the directions of arrows D and E. At this time, reel stand 6
The spheres 15a and 15b of a and 6b rotate while contacting the bottom surface of the small cassette 1, or the small cassette 1 floats inside the cassette storage 110. Further, the center of the reel stands 6a, 6b and the small reels 2a, 2
The motor 43 is stopped by switches 47a and 47b provided at positions where the centers of b are the same.
At the same time, the small cassette 1 is pushed toward the reel stands 6a and 6b by the leaf spring 112, and the reel stand 6
a, 6b and the small reels 2a, 2b engage with each other. Further, when the large cassette 8 is stored in the cassette storage 110, the cassette identification switch A46 and the cassette identification switch B48 are closed, and the motor 43 is closed.
rotates, and the pulley 40 moves the reel moving wire 3
7a, 37b, and simultaneously reel stands 6a, 6.
Move b in the direction opposite to the directions of arrows D and E. At this time, the spheres 15a and 15b of the reel stands 6a and 6b rotate while contacting the bottom surface of the large cassette 8, and the large cassette 8 is floating in the cassette storage 110. Further, switches 49a and 49b provided at positions where the centers of the reel stands 6a and 6b and the centers of the large reels 9a and 9b are the same cause the motor 4 to be
3 is stopped. At the same time, the large cassette 8 is pushed toward the reel stands 6a and 6b by the leaf spring 112,
The reel stands 6a, 6b engage with the large reels 9a, 9b. In the manner described above, the operation of mounting the small cassette 1 or the large cassette 8 onto the main body of the apparatus is completed.

Next, the tape loading operation will be explained. When the installation of the cassette into the main body of the apparatus is completed, the rotary cylinder 77 and the capstan motor 87 rotate, the motor 70 further rotates, the release gear 64 is rotated by the worm gear 68, and the release roller 62 is rotated by the worm gear 68. 8th from position
It moves to the position shown in the figure and FIG. 4, and is stopped by a position detector (not shown) of the release gear 64. The brake release lever 50 moves as the release roller 62 moves.
a and 50b are operated, and the brake lever 1
The braking of reel stands 6a, 6b of 8a, 18b is released. Also, at this time, the reel driving idler 52 comes into contact with the motor pulley 60, but the reel motor 6
1 does not rotate, the reel stands 6a and 6b are not driven. Next, the rotation ring 82 rotates clockwise, and the magnetic tape 5 is rotated to the rotation posts 71, 73, 74.
The tape is pulled out from the small cassette 1 or the large cassette 8 by the inclined post 72 to form a predetermined tape loop. At the same time, the reel drive pins 14a, 14b of the reel stands 6a, 6b are engaged with the small reels 2a, 2b or the large reels 9a, 9b, and tape loading is completed (first
Fig. 2). However, at this time, the pinch roller pressing pin 109 is not operating the pinch roller pressing lever 106. When tape loading is completed, the motor 70 rotates, the release gear 64 rotates half a rotation,
The release roller 62 moves from the position shown in FIG. 3 to the position on the worm gear 68 side and stops. At this time, the reel stands 6a, 6b are connected to the brake levers 18a, 18.
b, and the reel driving idler 52 is released from contact with the motor pulley 60. In this state, tape fast forwarding (FF), rewinding (REW), recording/playback (REC), and playback (PLAY) are performed.

Next, the tape fast forwarding operation will be explained. When the mode selection switch (not shown) is set to tape fast forward mode (FF mode), the motor 70 rotates, the release gear 64 rotates half a rotation, and the release roller 62 moves to the third
Move to the position shown in the diagram and stop. At this time, the braking of the brake levers 18a, 18b is released from the reel stands 6a, 6b, the reel motor 61 further rotates clockwise, and the reel driving idler 52 comes into contact with the motor pulley 60. The reel driving idler 52 is moved toward the take-up reel stand 6b by the rotational force of the reel motor 61, and the driving force of the reel motor 61 is generated by the automatic biting force of the reel driving idler 52 and the pressing force of the idler pressure contact spring 58. It is transmitted to the take-up reel stand 6b. At this time, the magnetic tape 5 is wound up and fast-forwarded by the small reel 2b or the large reel 9b. Next, when the mode selection switch (not shown) is set to the STOP mode, the motor 70 rotates, the release gear 64 rotates half a rotation, and the release roller 62 moves from the position shown in FIG. 3 toward the worm gear 68. At this time, reel stand 6
a and 6b are braked by the brake levers 18a and 18b, and furthermore, the reel drive idler 52 is released from contact with the motor pulley 60 and the take-up reel stand 6b, and the tape fast forwarding operation is stopped.

Next, the tape rewinding operation will be explained. When the mode selection switch (not shown) is set to the tape rewind mode (REW mode), the motor 70 rotates, the release gear 64 rotates half a rotation, and the release claw 62 moves to the position shown in FIG. At this time, reel stand 6
a, 6b are released from the brake levers 18a, 18b, the reel motor 61 further rotates counterclockwise, and the reel driving idler 52 comes into contact with the motor pulley 60. Idler 5 for reel drive
2 is moved toward the supply reel stand 6a by the rotational force of the reel motor 61, and the driving force of the reel motor 61 is applied to the supply reel stand 6a by the automatic biting force of the reel driving idler 52 and the pressing force of the idler pressure contact spring 58. communicated. At this time, magnetic tape 5
is wound and rewound by the small reel 2a or the large reel 9a. Next, when the mode selection switch (not shown) is set to the stop mode (STOP mode), the motor 70 rotates, the release gear 64 rotates half a rotation, and the release roller 62 moves from the position shown in FIG. 3 to the worm gear 68 side. . At this time, reel stand 6
a, 6b are braked by the brake levers 18a, 18a, and the reel driving idler 52 is released from contact with the motor pulley 60 and the supply reel stand 6a, and the tape rewinding operation is stopped.

Next, the magnetic tape recording/reproducing operation will be explained. When the mode selection switch (not shown) is set to recording or playback mode (REC or PLAY mode),
The rotating ring 82 rotates clockwise, and the pinch roller 81 is operated by the pinch roller pressing pin 109 to press against the capstan 80 and feed the magnetic tape 5 at a constant speed. At the same time, the tension post 25 comes into contact with the magnetic tape 5 and applies a constant back tension to the magnetic tape 5. At the same time, the take-up reel stand 9
b is the same as the tape rapid forwarding operation, and the magnetic tape 5 fed at a constant speed by the capstan 80 and the pinch roller 81 is wound up by the small reel 2b or the large reel 9b (FIGS. 1 and 2).
However, the driving voltage of the reel motor 61 is lower than that during tape fast-forwarding operation, the driving torque of the take-up reel stand 6b is small, and the capstan 80 is
It is designed so that it does not affect the rotation of the Next, when the mode selection switch is set to the stop mode (STOP mode), the drive of the take-up reel stand 6b is stopped in the same way as when tape fast forwarding is stopped, and furthermore, the drive of the take-up reel stand 6b is stopped.
b is braked by the brake levers 18a and 18b, and at the same time the rotary ring 82 is rotated counterclockwise until the pressure contact between the capstan 80 and the pinch roller 81 is released and the state is the same as when tape rowing is completed. The post 25 is released from contact with the magnetic tape 5, and recording and playback of the magnetic tape 5 is stopped.

Next, the tape unloading operation will be explained. When the unloading switch (not shown) is operated, the motor 70 rotates, the release gear 64 rotates half a rotation, and the release roller 62 moves to the position shown in FIG. 3 and stops. At this time, the reel stands 6a, 6b are released from the brake levers 18a, 18b,
Furthermore, the reel motor 61 rotates counterclockwise,
The reel driving idler 52 in contact with the motor pulley 60 is moved toward the supply reel stand 6a by the rotational force of the reel motor 61, and the driving force of the reel motor 61 is automatically bitten by the reel driving idler 52. The force and the pressing force of the idler pressure contact spring 58 are transmitted to the supply reel 6a. At the same time, the rotating ring 82 rotates counterclockwise, and the magnetic tape 5 forming the tape loop is wound onto the supply reel 2a or the supply reel 9a. Furthermore, when the rotation posts 71, 73, 74 and the inclined post 72 are returned to the small cassette 1 or the large cassette 8 by the rotation of the rotation link 82,
The rotation ring 82 stops, and at the same time, the drive of the supply reel stand 6a is stopped in the same way as tape rewinding is stopped.
Furthermore, the reel stands 6a and 6b are equipped with a brake lever 18.
The tape unloading operation is then braked by a and 18b, and the tape unloading operation is completed.

As described above, according to the present invention, even if the reel pitches of the large cassette and the small cassette are different, the reel stand is moved to a position corresponding to each reel, so it is easy to use the large cassette and the small cassette together. can be done. Furthermore, even if the center position of the reel stand is different from the reel center position of the cassette, the cassette is floated within the cassette storage, so the reel stand can be moved with a simple structure.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the device according to the present invention when using a small cassette (showing when recording and playing), FIG. 2 is a plan view of the device when using a large cassette according to the invention (showing when recording and playing), and FIG. FIG. 4 is a plan view showing the relationship between the reel drive section of the present invention and the brake lever; FIG. 5 is a cross-sectional view showing the structure of the reel stand of the present invention; FIG. 6 is a side view of Fig. 4, Fig. 7 is a sketch showing the small cassette adapter, and Fig. 8 shows how the cassette is attached to the reel stand when the cassette storage compartment is attached to the main body of the device and the center of the reel stand is different from the center of the reel stand. FIG. 9 is a side view showing the state in which the reel is floating above the reel, and FIG. 9 is a side view showing the state in which the reel is fitted onto the reel stand. 1...Small cassette, 2a, 2b...Reel, 5
...Magnetic tape, 6a, 6b...Reel stand, 7...
...Leaf spring, 8...Large cassette, 9a, 9b...Reel, 12...Leaf spring, 13...Compression spring, 14
a, 14b... Reel drive pin, 15a, 15b
... Sphere, 16a, 16b... Reel stand moving board, 18a, 18b... Brake lever, 22...
...Tension lever, 31a, 31b...Reel stand moving shaft, 32a, 32b...Spring pin, 3
3a, 33b... Spring, 34a, 34b, 35
a, 35b...position regulating stopper, 36a, 3
6b... Reel movement spring, 37a, 37b...
Reel moving wire, 40...Pulley, 43...
...Motor, 46...Cassette identification switch A, 4
7a, 47b...Switch, 48...Cassette identification switch B, 49a, 49b...Switch, 5
0a, 50b... Brake release lever, 52...
Reel drive idler, 58... Idler pressure contact spring, 61... Reel motor, 62... Release roller, 63a, 63b... Force pin, 64... Release gear, 70... Motor, 80... Capstan,
81...Pinch roller, 82...Rotating ring, 1
10...Cassette storage, 111...Adapter, 112...Leaf spring, 113...Lower case of storage.

Claims (1)

[Claims] 1 Long-time recording/playback cassette 8 and short-time recording/playback cassette 1 with the same magnetic tape 5 recording format
cassette identification means 4 for identifying both the cassettes 8 and 1;
6, 48, reel stands 6a, 6b which can be engaged with the reels 2a, 2b, 9a, 9b built in both the cassettes 8, 1, the cassette identifying means 46,
reel stand moving means 43 for moving the reel stands 6a, 6b so that the reel centers of the cassettes 8, 1 identified by 48 and the centers of the reel stands 6a, 6b are coaxial; ，
cassette pressing means 112 for pressing the cassette 1 downward in the cassette storage 110. When the reel center position of the cassette stored in the cassette storage 110 differs from the center position of the reel stands 6a, 6b when the storage 110 is attached to the main body of the apparatus, the cassette stored in the cassette storage 110 is The bottom surface of the cassette and the tops 15a, 15b of the reel stands 6a, 6b come into contact with each other, causing the cassette stored in the cassette storage 110 to float within the cassette storage 110 against the cassette pressing means 112. The cassette storage 110 is moved by the reel table moving means 43.
A magnetic recording and reproducing apparatus characterized in that said reel stands 6a and 6b are moved to the center position of a reel of a cassette housed in a magnetic recording and reproducing apparatus.